Electret input device and method for operating the same
a technology of input device and input device, which is applied in the direction of electric digital data processing, instruments, computing, etc., can solve the problems of capacitance touch panel high sensitivity, easy scratching of resistance touch panel, low sensitivity
Inactive Publication Date: 2013-02-28
KYE SYST CORP
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Benefits of technology
This patent describes a method for operating a device that detects changes in voltage levels on a touch surface and converts them to a digital output. The device first determines if the input signal is greater than a certain level, and then compares it with another set value to determine if the signal is an effective signal. This process helps to improve the accuracy and efficiency of detecting and interpreting touch on the surface.Overall, this technology provides a more robust and responsive user input for electret input devices.
Problems solved by technology
For example, the resistance touch panel is easily to be scratched.
Moreover, it only can be sensed by a larger touch force and thus has low sensitivity.
On the other hand, the capacitance touch panel has high sensitivity, but the manufacture process thereof is much complicated.
Furthermore, the capacitance touch panel cannot sense a non-conductor such as touch pen, fingerstall, and etc.
In addition, the electret touch device in the above mentioned patent application does not determine whether the input touch signal is an effective signal or an ineffective signal generated by mistake.
Therefore, when a user operates the current touch device, the user has to suspend hands to avoid an undesired operation caused by a careless touch of wrist or palm.
Method used
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[0015]In the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the disclosed embodiments. It will be apparent, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are schematically shown in order to simplify the drawing.
[0016]The detailed characteristics and advantages of the disclosure are described in the following embodiments in details, the techniques of the disclosure can be easily understood and embodied by a person of average skill in the art, and the related objects and advantages of the disclosure can be easily understood by a person of average skill in the art by referring to the contents, the claims and the accompanying drawings disclosed in the specifications.
[0017]FIG. 1 shows a block diagram for an electret input device according to an embodiment of the disclosure. The electret input ...
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A method for operating an electret input device includes the following steps. An input signal is received. It is determined whether a voltage level of the input signal is greater than a first preset value. If the voltage level is greater than the first preset value, the voltage level is compared with a second preset value to determine whether the input signal is an effective signal. If the input signal is the effective signal, the position value of the input signal is obtained. Then, the position value is compared with a preset position value to determine an input state of the electret input device. Finally, the input signal is converted to an output signal to be outputted.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This non-provisional application claims priority under 35 U.S.C. §119(a) on Patent Application No(s). 100130821 filed in Taiwan, R.O.C. on Aug. 26, 2011, the entire contents of which are hereby incorporated by reference.BACKGROUND[0002]1. Technical Field[0003]The disclosure relates to an input device and a method for operating the input device, and more particularly to an electret input device which is capable of determining the input state and a method for operating the electret input device.[0004]2. Related Art[0005]Recently, touch panel technology advances rapidly so that touch devices are widely used in various electronic products. Generally, there are two kinds of touch panels, i.e., capacitance touch panel and resistance touch panel. Each kind of touch panels has its own merits and shortcomings. For example, the resistance touch panel is easily to be scratched. Moreover, it only can be sensed by a larger touch force and thus has low...
Claims
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IPC IPC(8): G06F3/044
CPCG06F3/0202G06F3/0416G06F3/023
Inventor TSAI, CHENG-CHEWANG, YU-CHI
Owner KYE SYST CORP